In this work, I will present a mathematical treatment of the transport phenomena occurring at a rotating disk electrode, also known as RDE. For the treatment I will use known laws of hydrodynamics, such as Navier-Stokes equations, and laws of mass transport, namely Fick's laws. The system in question is hard to solve analytically, so we will use numerical methods to solve our problem. First we consider the velocity profile at the electrode. This is done by pseudo-analytical mathematical treatment. Then we use the explicit forward Euler method to solve the partial differential equation for mass transport. Finally, the numerical error is also considered.
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